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<head>
  <title>Google Earth API Samples - Globe/Window Event Handling</title>
  <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
  <!-- You should probably remove most of this extra cruft if you're copying
       this sample! -->
  <style type="text/css">@import "static/examples.css";</style>
  <style type="text/css">@import "static/prettify/prettify.css";</style>
  <script type="text/javascript" src="static/prettify/prettify.js"></script>
  
  <!-- Change the key below to your own Maps API key -->
  <script type="text/javascript" src="http://www.google.com/jsapi?hl=en&amp;key=ABQIAAAAwbkbZLyhsmTCWXbTcjbgbRSzHs7K5SvaUdm8ua-Xxy_-2dYwMxQMhnagaawTo7L1FE1-amhuQxIlXw"></script>
  <script type="text/javascript">
  /* <![CDATA[ */
  var ge;
  google.load("earth", "1");

  function init() {
    google.earth.createInstance('map3d', initCB, failureCB);
  }
  
  function initCB(instance) {
    ge = instance;
    ge.getWindow().setVisibility(true);
    
    // add a navigation control
    ge.getNavigationControl().setVisibility(ge.VISIBILITY_AUTO);
    
    // add some layers
    ge.getLayerRoot().enableLayerById(ge.LAYER_BORDERS, true);
    ge.getLayerRoot().enableLayerById(ge.LAYER_ROADS, true);

    ge.getLayerRoot().enableLayerById(ge.LAYER_TERRAIN, true);
    
    // Fly to the Grand Canyon
    var la = ge.createLookAt('');
    la.set(36.20839, -112.45803, 0, ge.ALTITUDE_RELATIVE_TO_GROUND, 
           -30, 40, 10000);
    ge.getView().setAbstractView(la);
    
    // listen to the click event on the globe and window
    google.earth.addEventListener(ge.getWindow(), 'mousemove', function(event) {
      var statusHTML = 'N/A';
      if (event.getDidHitGlobe()) {
        var latitude = event.getLatitude();
        var longitude = event.getLongitude();
        
        var groundAltitude = ge.getGlobe().getGroundAltitude(latitude, longitude);
        if (groundAltitude) {
          statusHTML = '<span style="color:#000; font-weight:bold;">' +
              groundAltitude.toFixed(2) + ' meters</span>';
        }
      }
      
      document.getElementById('ground-altitude').innerHTML = statusHTML;
    });
    
    document.getElementById('installed-plugin-version').innerHTML =
      ge.getPluginVersion().toString();
  }
  
  function failureCB(errorCode) {
  }
  
  /* ]]> */
  </script>
</head>
<body onload="if(window.prettyPrint)prettyPrint();init();">
  <h1>Google Earth API Samples - Globe/Window Event Handling</h1>
  <dl>
            <dt>Last Modified:</dt><dd>06/08/2009</dd>
    <dt>Installed Plugin Version:</dt><dd id="installed-plugin-version">...</dd>
  </dl>
  <div style="clear: both;"></div>
  
  <div id="ui" style="position: relative;">
    <div id="map3d" style="border: 1px solid silver; width: 500px; height: 500px;"></div>

    <div id="extra-ui" style="position: absolute; left: 520px; top: 0;">
      <p><em>Note: Zoom in to a spot with terrain to get ground altitudes.</em></p>
      <p>Ground Altitude at Mouse: <span id="ground-altitude" style="color:#ccc;">N/A</span></p>
      
      <h2>Relevant Resources:</h2>
      <ul>
<li><a href="http://code.google.com/apis/earth/documentation/reference/google_earth_namespace.html">google.earth Namespace Reference</a></li>
<li><a href="http://code.google.com/apis/earth/documentation/reference/interface_g_e_plugin.html">GEPlugin Reference</a></li>
<li><a href="http://code.google.com/apis/earth/documentation/reference/interface_g_e_globe.html">GEGlobe Reference</a></li>
<li><a href="http://code.google.com/apis/earth/documentation/reference/interface_kml_event.html">KmlEvent Reference</a></li>
<a id="playground-button" href="http://code.google.com/apis/ajax/playground/?exp=earth#globe/window_event_handling"><img src="static/playground-button.png"/></a>      </ul>
      <h2>Relevant Code Excerpt:</h2>      <pre class="prettyprint lang-js">ge.getLayerRoot().enableLayerById(ge.LAYER_TERRAIN, true);

// Fly to the Grand Canyon
var la = ge.createLookAt('');
la.set(36.20839, -112.45803, 0, ge.ALTITUDE_RELATIVE_TO_GROUND, 
       -30, 40, 10000);
ge.getView().setAbstractView(la);

// listen to the click event on the globe and window
google.earth.addEventListener(ge.getWindow(), 'mousemove', function(event) {
  var statusHTML = 'N/A';
  if (event.getDidHitGlobe()) {
    var latitude = event.getLatitude();
    var longitude = event.getLongitude();
    
    var groundAltitude = ge.getGlobe().getGroundAltitude(latitude, longitude);
    if (groundAltitude) {
      statusHTML = '&lt;span style=&quot;color:#000; font-weight:bold;&quot;&gt;' +
          groundAltitude.toFixed(2) + ' meters&lt;/span&gt;';
    }
  }
  
  document.getElementById('ground-altitude').innerHTML = statusHTML;
});</pre>    </div>
  </div>
</body>
</html>
